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[email protected]CVE-2021-4157

HistoryMar 25, 2022 - 7:15 p.m.

CVE-2021-4157

2022-03-2519:15:09

CWE-119

[email protected]

web.nvd.nist.gov

175

cve-2021-4157

linux

kernel

nfs

security

vulnerability

memory bounds write

escalation of privileges

system crash

7.4 High

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:A/AC:M/Au:S/C:C/I:C/A:C

8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.6 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

44.1%

JSON

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤5.13

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "kernel 5.13-rc1"
      }
    ]
  }
]